Photo to Scan PDF: Turn Phone Photos of Documents Into a Clean PDF

Turn phone photos of documents into a clean PDF

You need to send a signed form, a receipt or a page of notes, and there is no scanner nearby. A phone photo works, but it comes out at an angle, with a shadow across it and a bit of the desk around the edge. This tool fixes that. It finds the edges of the page, straightens it into a neat rectangle, whitens the paper and darkens the writing, then saves every page into one PDF.

Scanner apps do the same, but many upload your pages to their cloud, add a watermark or ask for a subscription. Here the photos are opened and processed by your own browser, and the PDF is made on your device. Nothing is uploaded.

When it comes in handy

• Expense claims. Photograph the day's receipts and send one tidy PDF instead of six crooked photos.
• Signed forms. Sign the paper copy, take a photo, and send back something that looks like it went through a scanner.
• Meeting notes and whiteboards. Keep handwritten notes as a PDF next to the typed minutes. The Colour look keeps the marker colours.
• Working from home. No printer-scanner at home? A phone and this page do the same job for most paperwork.
• Old letters and certificates. Make a clean copy before the original goes into a drawer.

How to use it

1. Add your photos. Choose them, drop them on the box, or on a phone press Take a photo. One photo makes one page.
2. Check the corners. The tool finds the edges of the page by itself. If a corner is off, drag it to the right spot. On a computer you can also click a corner and nudge it with the arrow keys.
3. Pick a look. Scan gives crisp black text on white paper, which is best for forms and letters. Grayscale keeps pencil and soft shading, Colour keeps stamps and highlighter but still evens out the light, and Original only straightens the page.
4. Put the pages in order with the arrows under each page, and remove any you do not need.
5. Download. Choose A4 or Letter, pick a quality, and press Download PDF.

Tips for a better scan

• Contrast helps. Put white paper on a darker table. The edges are found by the difference between the page and what is around it.
• Fill the frame, but leave a thin border of table around the page so all four corners are in the picture.
• Avoid your own shadow. Hold the phone a little to the side of the light, not between the light and the page. The Scan look removes soft shadows, but a hard, dark shadow can hide writing.
• Hold the phone flat above the page. The tool can straighten a tilted photo, but text far from the camera has fewer pixels, so a straight-on shot is sharper.

Which quality should I choose?

Standard suits most uses: forms, letters and receipts stay sharp when printed, and a page is usually a few hundred kilobytes. Small file is for email attachments with a size limit. Sharp keeps small print readable when someone zooms in, at the cost of a larger file.

How this tool was tested

Before publishing, I ran 49 automated checks on the finished page in a Chromium-based browser. Last full run: 14 November 2026. The test photos were drawn in the page: a light sheet with black lines on a dark desk, turned by a known angle, so the true corners could be worked out with plain trigonometry, separately from the tool.

• Geometry: 200 random four-corner shapes, each mapped exactly onto a rectangle (error under a thousandth of a pixel).
• Finding the page: a straight page, pages turned 10 and 25 degrees, a small page near the corner of the photo and a page under a heavy shadow. Every time the corners were found within 2% of the photo width. A photo with no page falls back to the whole photo.
• Straightening: after straightening, every line of "text" runs level across the page and the gaps between lines stay light.
• The Scan look: on a page with a shadow across one side, the paper comes out white on both sides and the text stays black.
• The PDF: page sizes for A4, Letter and Fit photo; wide pages go on landscape paper; narrow receipts are centred, not stretched; the file gets bigger from Small to Standard to Sharp. Every download was opened again and its pages measured.
• Using the tool and problems: adding, ordering, rotating and removing pages, moving corners with the mouse and the arrow keys, and clear messages for a text file, a HEIC photo the browser cannot open, and a damaged photo.

What the tests did not cover: the photos were drawn, not taken with a real phone, so very busy backgrounds (a patterned tablecloth, a white page on a white desk) may need the corners moved by hand. I did not run the tests in Firefox or Safari. Something not working? Tell me on the contact page.

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